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record increase

Thread Status: Hello , There was no answer in this thread for more than 60 days.
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New Member
Jul 8, 2003
hello everyone

Someone told me that the time you can stay underwater increases after the 3d-4th dive(apnea).Can anyone tell me why this happens?

Thank's a lot
That's when the mammalian dive-reflex starts to kick in.
Humans still have some built in mechanism left over from the old days. It will help you conserve oxygen by slowing your heart-rate and sending less blood to your non-critical body parts.
On top of that the spleen will release some additional red blood cells that can carry around more oxygen.